Chetan Awasthi , Firoz Khan , R. Meena , Asokan Kandasami , S.S. Islam
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Ion irradiation of reduced graphene oxide for near-infrared photodetector applications
Due to rapid technological advancements, NIR photodetectors are utilized in various domains, including tracking brain activity, heartbeats, night vision, deep tissue imaging, smart wearables, enabling fast internet, monitoring the planet from space, and other similar applications. In recent years, graphene and its derivatives, such as reduced graphene oxide (RGO), have been considered a good choice due to defect-state transitions and tunability. In this work, we report for the first time the photodetection efficiency in an optical sensor through ion beam exposure of pristine RGO films. Ion irradiation induces structural changes and tunes the photoresponse of the RGO films. Here, 100 MeV Ni-irradiated RGO films show the highest photoresponse with optimal fluences in the range 1 × 1011 to 5 × 1011 ions/cm2. This work highlights the potential of ion irradiation as a versatile tool for modifying 2-D material properties, with significant implications for RGO-based photodetectors, optoelectronic devices, and sensors, and paves the way for future research in this field, enabling the development of high-performance devices.
期刊介绍:
Section B of Nuclear Instruments and Methods in Physics Research covers all aspects of the interaction of energetic beams with atoms, molecules and aggregate forms of matter. This includes ion beam analysis and ion beam modification of materials as well as basic data of importance for these studies. Topics of general interest include: atomic collisions in solids, particle channelling, all aspects of collision cascades, the modification of materials by energetic beams, ion implantation, irradiation - induced changes in materials, the physics and chemistry of beam interactions and the analysis of materials by all forms of energetic radiation. Modification by ion, laser and electron beams for the study of electronic materials, metals, ceramics, insulators, polymers and other important and new materials systems are included. Related studies, such as the application of ion beam analysis to biological, archaeological and geological samples as well as applications to solve problems in planetary science are also welcome. Energetic beams of interest include atomic and molecular ions, neutrons, positrons and muons, plasmas directed at surfaces, electron and photon beams, including laser treated surfaces and studies of solids by photon radiation from rotating anodes, synchrotrons, etc. In addition, the interaction between various forms of radiation and radiation-induced deposition processes are relevant.